Conductor composition and method of manufacturing a multilayered ceramic body using the composition

Abstract

Disclosed are a CuO conductor paste which is effective for making a multilayered ceramic body, the conductor material of which is made of copper, and a method of manufacturing a multilayered ceramic body using the conductor paste. The conductor paste is made of CuO as the main component with an addition of at least one of PbO-based glass, or any of Bi2O3-based glass, CuO-based glass and CuAl2O4 as the additive. The multilayered ceramic body is manufactured by a method comprising a forming process for making a multilayered body from the conductor paste and dielectric material, a binder removing process by heat treating the multilayered body, thus obtained, in air, a reduction process for reducing CuO to copper in a mixed gas atmosphere of hydrogen and nitrogen, and a sintering process for sintering the multilayered body thus reduced in a nitrogen gas atmosphere.

What is claimed is: 
     
       1. A conductor composition consisting essentially of an inorganic component and an organic vehicle, wherein said inorganic component consists essentially of 85 to 99.5 weight % of powdered CuO, and 0.5 to 15 weight % of at least one member selected from the groups consisting of powdered PbO-based glass comprising 5 to 70 weight % of PbO, powdered Bi 2  O 3  -based glass comprising 5 to 60 weight % of Bi 2  O 3 , powdered CuO-based glass comprising 1 to 30 weight % of CuO, and powdered CuAl 2  O 4 . 
     
     
       2. A conductor composition as claimed in claim 1, wherein said inorganic component comprises said powdered CuO at a weight percent of 85 to 99.5 and said powdered PbO-based glass at a weight percent of 0.5 to 15. 
     
     
       3. A conductor composition as claimed in claim 1, wherein said inorganic component comprises said powdered CuO at a weight percent of 85 to 99.5 and said powdered Bi 2  O 3  -based glass at a weight percent of 0.5 to 15. 
     
     
       4. A conductor composition claimed in claim 1 wherein said inorganic composition contains said powdered CuO at a weight percent of 85 to 99.0 and said powdered CuO-based glass at a weight percent of 1 to 15. 
     
     
       5. A conductor composition as claimed in claim 1, wherein said inorganic component comprises said powdered CuO at a weight percent of 85 to 99.5 and said powdered CuAl 2  O 4  at a weight percent of 0.5 to 15. 
     
     
       6. A conductor composition as claimed in claim 1, wherein said PbO-based glass comprises PbO at 5 to 70 weight %, B 2  O 3  at 0.5 to 30 weight %, Al 2  O 3  at 0.1 to 15 weight %, MgO at 0 to 5 weight %, ZrO 2  at 0 to 5 weight %, Y 2  O 3  at 0 to 3 weight % and SrO at 0 to 3 weight %. 
     
     
       7. A conductors composition as claimed in claim 1, wherein said Bi 2  O 3  -based glass comprises Bi 2  O 3  at 5 to 60 weight %, PbO at 1 to 40 weight %, B 2  O 3  at 0.5 to 20 weight %, SiO 2  at 0.1 to 20 weight %, MgO at 0 to 5 weight %, ZrO 2  at 0 to 5 weight %, Y 2  O 3  at 0 to 3 weight % and SrO at 0 to 3 weight %.